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Sheffield Astronomy Seminars

Organised by Joachim Bestenlehner and Manu Bernhard

Full Autumn semester 2018/19 (Aug 2018 to Feb 2019)

Jet populations, environments and what we’re learning from LOFAR surveys

Judith Croston (Open University)

Wed 21 Nov 2018

15:30 in Hicks Lecture Theatre 7

Abstract:

New radio surveys provide an opportunity to pin down the demographics of the radio-loud AGN population to low luminosities and to high redshifts, and across the full range of AGN life stages. But if we want to exploit these population statistics to obtain a physical understanding of jet evolution and energetic impact across the galaxy population, we need to know how observable radio properties can be converted to jet powers and lifetimes, and we need to understand the links between jet populations, host galaxies and large-scale environment. I will provide an overview of recent work on jet energetics and environments, as well as highlights of ongoing work exploiting the LOFAR Two-Metre Sky Survey (LoTSS), which provides the deepest view over a wide area (424 deg^2) of any existing radio survey, with sufficient resolution to measure jet sizes and morphologies, and is providing the most detailed information to date about when, where and how radio-loud AGN feedback is taking place at z<1.

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Department of Physics and Astronomy, Astronomy Group
University of Sheffield, Hicks Building, Hounsfield Road
Sheffield S3 7RH, UK
Phone: +44 (0)114 222 4536, Fax: +44 (0)114 222 3555
E-mail: Joachim Bestenlehner